Print-drier.



E. S. KRANTZ & J. W. KNUTESON.

PRINT DRIER.

APPLICATION FILED MAR. 4, 19.11.

Patented Aug. 20, 1912.

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E. S. KRANTZ & J. W. KNUTBSON.

PRINT DRIER.

APPLIOATION FILED MAB. 4, 1911. 1,036,268.

Patented Aug. 20, 1912.

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UNITED STATES PATENT OFFICE.

ERNEST s. KEANTZ AND .IOIIN w. KNUTESON, OE MINNEAPOLIS, MINNESOTA.

PRINT-DRIER.

Specification of Letters Patent.

Patented Aug. 20, 1912.

To all whom t may concern.'

Be it known that we, ERNEST S. KRANTZ and JOHN l/V. KNUTEsoN, ofMinneapolis, Hennepin county, Minnesota, have invented certain new anduseful Improvements in Print-Driers, of which the following is aspecication.

The object of our invention is to provide an apparatus for dryingphotographic prints which will dispense ent-irely with the use of flatblotter sheets, generally employed for this purpose, will protect theprints from exposure to dust and dirt and will enable the operator todry a large number of prints at one time.

A further obj ect is to provide a print drying apparatus which can beeasily handled and will be compact and durable.

The invention consists generally in various constructions andcombinations, all as hereinafter described and particularly pointed outin the claims.

In the accompanying drawings forming part of this specification, Figure1 is a side view of a print drying apparatus embodying our invention,Fig. 2 is a longitudinal sectional view of the same, Fig. 3 is atransverse sectional view.

In the drawing, 2 represents the lower portion of a casing, composed ofsuitable material, preferably sheet metal, having supporting legs 3 andan upper section 4, said lower section having its upper edge rolledinwardly and said upper section having a flanged edge to form a closejoint with the upper edge of the lower section. The lower section isprovided with upright brackets 6 having notches 7 and 8 formed thereinto receive the ends of a shaft 9. Upon this shaft a hollow drum 10 ismounted having open ends and held against turning too freely on saidshaft by a spring 11 and a friction disk 12. The shaft 9 has a crank 13formed on one end by means of which, when the shaft is seated in theupper notches of the brackets, the drum can be easily and freelyrevolved. The drum is provided with a smooth, peripheral surface havingflanges 14 at each end and between these flanges a long strip ofmaterial, 15, preferably blotting paper, is wound and between the coilsof this blotting paper the wet prints are placed in the usual way andthe aper wound on the drum until the capacity of the drum or the casinghas been reached.

The notches 7 are adapted to receive the shaft 9 kwhen the drum isarranged within the casing during the drying operation, and the notches8 receive the shaft 9 when the drum is lifted for reeling purposes. Inconnection with the flanges 14 we prefer to provide bars 14 to hold thecoils in place on the drum.

It is desirable in a device of this kind to provide an artificial meansfor hastening the drying of the prints, and we therefore provide a pipe16 extending horizontally in the bottom of the section 2 and having adown- Wardly turned' end 17 terminating in a funnel 18 beneath which asuitable heat-ing means, such as the lamp 19, is arranged. At the otherend of the pipe an upwardly turned portion 20 is provided having itsopen end-opposite the open end of the drum so that the heat will notonly radiate from the walls of the pipe beneath the drum but the aircurrents will be discharged through the open end of the pipe into theinterior of the drum, causing a circulation around and through it, thushastening the drying of the prints and insuring the uniform continuousapplication of the artificial heat to both sides of the blotter strips.This heat will not only hasten the drying of the prints but will alsokeep the sheet or strip of blotting paper dry so that as fast as one setof prints have been dried they may be removed from the paper and anotherset substituted therefor without waiting for the drying of the blottingpaper, as is often necessary. To promote circulation through the drum anoutlet 21 is provided through which the heated air may escape.

In using the device, the drum is raised and supported on the upper endsof the brackets 6 in the slots 8. In this position the crank 13 will beaccessible and may be revolved for winding or unwinding the blotterstrip. We also prefer to'provide a reel 22 having a crank 23 supportedon legs 24 and pivotally connected by bars 25 with pins 26 which aremounted in the brackets 6. These bars are readily detachable from thebrackets and the reel may be set aside until such time as it is desiredto wind the blotter upon the reel or unwind it from the reel andtransfer it to the drum.

We claim as our invention:

1. A print drier comprising a closed casing, a drum fitting therein andhaving open ends, said drum being adapted to support a strip of blottingpaper wound thereon,

between the coils of which the prints are placed, a warm air pipeprovided in the bottom of said casing and having an open end near theopen end of said drum, and a discharge pipe provided in the top of saidcasing.

2. A print drier comprising a casing having an upper and a lowersection, brackets mounted in said lower sect-ion and projectingvertically into said upper section when the sections are placedtogether, the upper portions of said brackets being exposed when saidupper section is raised, a ydrum having bearings in the lower and upper,

portions of said bracketsA and adapted to be revolved when placed insaid upper bearings to wind a drying material on said druml or to unwindit therefrom, and means foi" revolving said drum.

3. A print drier comprising a casing havingv a warm air intake andanexhaust opening, a drum mounted in said casing and having open ends, thecurrents of warm air circulating around said drum and through beingadapted to receive a strip of drying tially as described.

t. A print drier comprising a casing havingH upper and lower sections,brackets i mounted in said lower sections and having being adapted tosupport a strip of drying material wound thereon, between the coils ofwhich the prints are placed, the upper section of said casing beingseparable from the lower section to allow the insertion of said shaftinto the upper Vnotches in said brackets and the free revolution of saiddrum.

5. A print drier comprising a casing, a

,drum mounted therein adapted to support 4a strip of drying material,between the coils y of which the prints are placed, said drum jhavingopen ends, a space being provided between said drum and said casing toallow circulation around and through said drum.

means for introducing warm air into said lcasing and said casing havingan exhaust opening through which the heated air may escape,substantially as described.

said open ends, thev periphery of said drum our hands this 27th day ofFebruary, 1911. material wound thereon between the coils r of which theprints are placed, substany In witness whereof we have hereunto setERNEST S. KRANTZ. JOHN W. KNUTESON.

(Topics of' this patent may be obtained for ve cents? each, byaddressing the Commissioner of Patents. I

Washington, D. C.

